allows exported json stats in http format

core/emperor.c

@@ -1129,6 +1129,13 @@ void emperor_send_stats(int fd) {
 		return;
 	}
 
+	if (uwsgi.stats_http) {
+                if (uwsgi_send_http_stats(client_fd)) {
+                        close(client_fd);
+                        return;
+                }
+        }
+
 	struct uwsgi_stats *us = uwsgi_stats_new(8192);
 
 	if (uwsgi_stats_keyval_comma(us, "version", UWSGI_VERSION))

core/master_utils.c

@@ -778,6 +778,13 @@ void uwsgi_send_stats(int fd) {
 		return;
 	}
 
+	if (uwsgi.stats_http) {
+		if (uwsgi_send_http_stats(client_fd)) {
+			close(client_fd);
+			return;
+		}
+	}
+
 	struct uwsgi_stats *us = uwsgi_stats_new(8192);
 
 	if (uwsgi_stats_keyval_comma(us, "version", UWSGI_VERSION))

core/utils.c

@@ -4891,3 +4891,21 @@ int uwsgi_kvlist_parse(char *src, size_t len, char list_separator, char kv_separ
 	free(buf);
 	return 0;
 }
+
+int uwsgi_send_http_stats(int fd) {
+	struct uwsgi_buffer *ub = uwsgi_buffer_new(uwsgi.page_size);
+	if (!ub) return -1;
+
+	if (uwsgi_buffer_append(ub, "HTTP/1.0 200 OK\r\n", 17)) goto error;
+	if (uwsgi_buffer_append(ub, "Connection: close\r\n", 19)) goto error;
+	if (uwsgi_buffer_append(ub, "Content-Type: application/json\r\n", 32)) goto error;
+	if (uwsgi_buffer_append(ub, "\r\n", 2)) goto error;
+
+	if (uwsgi_buffer_send(ub, fd)) goto error;
+	uwsgi_buffer_destroy(ub);
+	return 0;
+	
+error:
+	uwsgi_buffer_destroy(ub);
+	return -1;
+}

core/uwsgi.c

@@ -305,6 +305,7 @@ static struct uwsgi_option uwsgi_base_options[] = {
 #endif
 	{"stats", required_argument, 0, "enable the stats server on the specified address", uwsgi_opt_set_str, &uwsgi.stats, UWSGI_OPT_MASTER},
 	{"stats-server", required_argument, 0, "enable the stats server on the specified address", uwsgi_opt_set_str, &uwsgi.stats, UWSGI_OPT_MASTER},
+	{"stats-http", no_argument, 0, "prefix stats server json output with http headers", uwsgi_opt_true, &uwsgi.stats_http, UWSGI_OPT_MASTER},
 #ifdef UWSGI_MULTICAST
 	{"multicast", required_argument, 0, "subscribe to specified multicast group", uwsgi_opt_set_str, &uwsgi.multicast_group, UWSGI_OPT_MASTER},
 	{"multicast-ttl", required_argument, 0, "set multicast ttl", uwsgi_opt_set_int, &uwsgi.multicast_ttl, 0},

plugins/corerouter/corerouter.c

@@ -933,6 +933,13 @@ void corerouter_send_stats(struct uwsgi_corerouter *ucr) {
 		return;
 	}
 
+	if (uwsgi.stats_http) {
+                if (uwsgi_send_http_stats(client_fd)) {
+                        close(client_fd);
+                        return;
+                }
+        }
+
 	struct uwsgi_stats *us = uwsgi_stats_new(8192);
 
         if (uwsgi_stats_keyval_comma(us, "version", UWSGI_VERSION)) goto end;

uwsgi.h

@@ -1832,6 +1832,7 @@ struct uwsgi_server {
 	// the stats server
 	char *stats;
 	int stats_fd;
+	int stats_http;
 
 	uint64_t queue_size;
 	uint64_t queue_blocksize;
@@ -3394,6 +3395,7 @@ char *uwsgi_matheval_str(char *);
 #endif
 
 int uwsgi_kvlist_parse(char *, size_t, char, char, ...);
+int uwsgi_send_http_stats(int);
 
 void uwsgi_check_emperor(void);
 #ifdef UWSGI_AS_SHARED_LIBRARY